Expanding its lineup of biogas engines for a wider range of power outputs, GE has introduced its Waukesha APG1000 gas engine that can use a broader variety of biogases, including from landfills, wastewater treatment plants and agricultural waste.

The Waukesha unit’s expanded biogas capabilities result from an 18-month redesign and testing initiative that includes modifications to the combustion chamber; a new spark plug design; and a new fuel control system that simplifies engine start-up and operation, said GE.

For example, the engine’s greater fuel tolerances allow it to handle fluctuations in the thermal quality of the biogas with little or no manual intervention.

These modifications were required to address the unique operational challenges of using biogases and were validated at both landfill and digester biogas-to-energy project sites, said the manufacturer.

“The APG1000’s new biogas fuel system has made a significant improvement to the engine’s load stability, despite fluctuations in the heating value of the fuel gas,” said Bob Weston, managing director, Entec Services.

“This is particularly beneficial on smaller digester and landfill sites, which, by their nature, are more prone to varying fuel quality. The new system provides an automated response to fuel gas fluctuations that results in faster, more reliable engine starts as well as more consistent engine output with less manual intervention. These benefits can lead to decreased operating costs and increased revenues for operators.”

GE said the introduction of the APG1000 for small biogas projects illustrates the strategy behind its recent acquisitions of Dresser Inc., Waukesha Engine’s parent company, as well as Calnetix Power Solutions, which developed Clean Cycle, a small 125 kW waste-heat power generation module that boosts the efficiency of small biogas projects. “The upgraded Waukesha APG1000 biogas engine helps us address the demand for more biogas engine choices as more customers ask for cost-effective onsite power solutions,” said Rafael Santana, president of gas engines for GE Energy.

“The engine is specifically of interest for smaller onsite power projects notably in the 60 Hz segment for the US. This is a great addition to GE’s globally established biogas-to-energy portfolio with Jenbacher gas engines solutions.”

The APG1000 is available for natural gas and biogas applications, with the option of also incorporating Waukesha combined heat and power technology:

  • APG1000 Enginator genset rated at 1014 kWe at 50 Hz (1500 rpm) and 1117 kWe at 60Hz (1800 rpm).
  • 16V150 LTD Engine rated at 1038 kWb at 50 Hz (1500 rpm) and 1142 kWe at 60Hz (1800 rpm).

MAN engines to power Russian diamond mine

NG-Energo, which won the bidding round to construct a turnkey 24 MW power plant for the JSC Severalmaz group in the north of European Russia, has picked MAN Diesel & Turbo to provide the plant’s main generators, which will comprise six MAN 18V28/32S Holeby-designed four-stroke gensets powered by diesel oil.

The contract with JSC Severalmaz requires that NG-Energo delivers a turnkey product, and covers construction, purchase and installation as well as logistics. The project will be executed in a year in close co-operation between the customer and Order Project Management at MAN Diesel & Turbo in Holeby, Denmark.

The project will be carried out in two phases, the first of which is planned to commence in May 2012. MAN Diesel & Turbo is contracted to deliver the gensets in two batches of three engines, with the first scheduled for December 2011 and the second for October 2012.

JSC Severalmaz is an ore and diamond mining company established in 1992 and one of the newer players in Russian mining. The new power plant will provide electricity to aid the exploitation of one of Europe’s largest diamond deposits. Located in the Primorsky district in the Arkhangelsk region, some 100 km north of the city of Arkhangelsk, the mine has an estimated lifetime of over 50 years with a potential value of €8.4 billion ($11.2 billion). About 60 per cent of the raw diamonds are of gem quality.

Jinan Diesel gensets combat Nigeria energy crisis

Jinan Diesel Engine Company (JDEC) of China, owned by China National Petroleum Company (CNPC), is supplying natural gas engines, dual fuel engines and gensets to Nigeria to improve electricity supply.

JDEC staff are already working on Nigerian installations of its engines, which range in output from 20 kW to 7 MW, said Qixun Song, general manager of CNPC’s Gas Engines Division.

A wide range of gas engines and generating sets from JDEC are now available in the country through a strategic partnership agreement with Emel Advanced Power Solution (EAPS). The selection offered by CNPC JDEC includes series 105,140, 190, 260 and 320.

Both IPPs and industrial customers represent significant markets, said Song. “We are already working with several large companies which are successfully utilising our natural gas powered gensets for their manufacturing units,” he said.

“We have a strong team on the ground and have set up a 24/7 after-sales service centre dedicated to providing prompt back-up and service to our customers.”

Xuejiang Sun, head of African Division, CNPC JDEC, said EAPS has “a strong foothold” in the Nigerian market to aid installations.

“We are leveraging their ground level expertise and infrastructure to strengthen our capability and enhance our reach,” he said.

Symbion and Aggreko add 87 MW to Tanzania grid

Power rationing in Tanzania has been eased by the integration of 87 MW from Symbion Power and Aggreko, according to a report in IPP Media.

Energy and Minerals Minister William Ngeleja said in early September that the Symbion power plant would add 37 MW to its 75 MW output through firing up three Jet A1 liquid fuel run machines.

Aggreko’s Ubungo power plant would also come online to contribute an extra 50 MW to the grid, he said.

Ngeleja said Aggreko had imported 63 generators for the Ubungo power plant and would shortly receive others for its Tegeta facility. Aggreko has been contracted to produce 100 MW, through 50 MW from each of the two plants, he said.

Tanzania’s longstanding power shortage will also be reduced by the Jacobsen electro power plant project, owned by the government under the state utility Tanesco.

The plant was due to be ready by June next year, but is now set to come online in December to help tackle the power crisis.

Three generators have arrived, each of 35 MW, said Ngeleja.

“We shall start fixing the machines in October this year, one after another, and by December we shall have accomplished the exercise for the production of 105 MW,” he said.

Ngeleja assured investors that the power problem will end soon.

“We, the government are making a lot of efforts to ensure that the problem is resolved,” he said.

Symbion Power Tanzania Limited, Aggreko, Independent Power Tanzania Limited (IPTL) and the National Social Security Fund (NSSF) have been contracted by the government through Tanesco to resolve the country’s power crisis.

Tanesco managing director William Mhando said that by the end of September the utility would be receiving a total of 300 MW – 100 MW from each of three plants: Symbion, Aggreko and Independent Power Tanzania Limited.

Symbion has plans to raise its total production in Tanzania to 317 MW. Symbion’s assistant plant manager Moses Mwandenga said the company had converted some turbines to use jet fuel.

Last month the government unveiled a power rescue plan to produce 572 MW to overcome a deficit of 260 MW, assuring the nation that the proposal would end the power rationing between September and December this year.

Tanzania’s public power utility introduced rolling blackouts nearly a year ago due to recurring drought and undercapacity of the existing natural gas supply infrastructure.

Natural gas and heavy furnace oil along with jet fuel and diesel account for almost half of power generation in Tanzania, while hydroelectric plants contribute the rest.

Wärtsilä to supply gas-fuelled power plant in UAE

Wärtsilä has been awarded the contract to supply the equipment and engineering for a power plant for the utility Utico FZC in the emirate of Ras Al Khaimah in the United Arab Emirates (UAE).

The 39 MW plant will be powered by four 20-cylinder Wärtsilä 34SG generating sets fuelled by natural gas. Wärtsilä describes the plant as the first in the Middle East to be fuelled by gas engines as well as the company’s first gas power project in the UAE.

The contract has been signed with Utico FZC, an independent utility. The power plant is expected to operate from spring 2012 and will be used to supply electricity to industries in the surrounding area. Rapid industrial development and new real estate development has propelled a surge in demand for electricity in the area.

Lars-Åke Kjell, regional director of Wärtsilä Power Plants Middle East, described the plant as “a showcase project for Wärtsilä and another example of our ability to provide smart power generation solutions”. “It will demonstrate to operators throughout the region the high quality and reliability of our technology in this field,” he said.

“We were able to meet the customer’s needs for reliability, both technically and as a business partner. We will also be able to provide valuable support for the operation from our service centre in Dubai.”

Utico describes itself as the largest full service, independently held private utility in the UAE.

The company provides a complete spectrum of utility services, including electricity generation, transmission and distribution.

Its largest projects include a 22.4 MIGD (million imperial gallon per day) seawater desalination plant, a 40 MW gas fired power plant, a 10,000 TR (tons of refrigeration) chilled water system, 120 km of transmission network, and more than 150 km of distribution network.

Wärtsilä LLC, located in Dubai, UAE, is a fully equipped service office and workshop geared to meet the needs of its local and global customers with more than 300 employees.

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